<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <el-table :data="roleList" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']"
              v-for="(item1,i1) in scope.row.children"
              :key="item1.id"
            >
              <el-col :span="5">
                <el-tag closable @close="removeRightsById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-arrow-right"></i>
              </el-col>
              <el-col :span="19">
                <el-row
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                  :class="[i2 === 0?'':'bdtop','vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      closable
                      @close="removeRightsById(scope.row,item2.id)"
                      type="success"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-arrow-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      closable
                      @close="removeRightsById(scope.row,item3.id)"
                      type="warning"
                      v-for="(item3) in item2.children"
                      :key="item3.id"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightsDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <el-dialog @close="setRightsDialogClosed" title="分配权限" :visible.sync="setRightDialogVisible" width="50%" >
      <el-tree ref="treeRef" default-expand-all :default-checked-keys="defkeys" show-checkbox node-key="id" :data="rightslist" :props="treeProps" ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allowRights(roleId)">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      roleList: [],
      setRightDialogVisible:false,
      rightslist:[],
      treeProps:{
        children:'children',
        label:'authName'
      },
      defkeys:[],
      roleId:"",
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败！");
      } else {
        this.roleList = res.data;
      }
    },
    async removeRightsById(role, id) {
      const confirmRes = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmRes !== "confirm") {
        return this.$message.info("已取消删除操作");
      } else {
        const { data: res } = await this.$http.delete(
          `roles/${role.id}/rights/${id}`
        );
        if (res.meta.status !== 200) {
          return this.$message.error("删除权限成功！");
        } else {
          // 不推荐使用刷新全局列表
          // this.getRolesList()
          role.children = res.data;
        }
      }
    },
    async showSetRightsDialog(role) {
      this.roleId = role.id
      const {data:res} = await this.$http.get("rights/tree")
      if(res.meta.status !== 200){return this.$message.error("获取权限数据失败！")}
      this.rightslist = res.data
      this.getLeafKeys(role,this.defkeys)
      this.setRightDialogVisible = true
    },
    // 通过递归函数保存三级菜单的数据
    getLeafKeys(node ,arr){
      if(!node.children)return arr.push(node.id)
      node.children.forEach(item=>{this.getLeafKeys(item,arr)})
    },
    setRightsDialogClosed(){
      this.defkeys = []
    },
    async allowRights(id){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(",")
      const {data:res} = await this.$http.post(`roles/${id}/rights`,{rids:idStr})
      if(res.meta.status !== 200){
        return this.$message.error("分配权限失败！")
      }else{
        this.$message.success("分配权限成功")
        this.setRightDialogVisible = false
        this.getRolesList()
      }
    },
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>